Opinions wanted and greatly appreciated!

[adv1288]

I have a '87 Monte ss. I am looking for idea's on heads, cam & converter set up for the below. I want to make apprx. 400-425hp with a factory bottom end.

Rebuilt 400 sbc 2 bolt main
Factory rotating assembly
Holley 750 double pumper mechanical secondaries & manual choke
current cam hydraulic flat tappet 262/272 .420/.442 112 lsd
Craptastic 882 heads
1.5 rockers
Weiand stealth intake
Msd hei dist
Msd 8.5 plug wires
march pulleys
spectre cold air intake
100 amp alt
Optima red top
3 core aluminum rad
Flexalite elec. extreme black magic s blade fan

Trans- th200r4
factory converter
B&M shift kit

Rear- Gn 8.5 posi 3.42 gear

Any and all opinions are greatly appreciated. Just want to see what you guy's may think. Thanks in advance.

 

[86Cutlass383SR]

Here' s some numbers pulled from Comp Cams Camquest. I used 10-1 comp, AFR 195 heads, high flow dual plane intake, 750 cfm, small tube headers.

XFI 280 hyd roller cam - 230/236 on 113* LSA - 466h@6000/484t@400 with mufflers. 488/498 open headers.
280HR hyd roller - 224/224 on 110* - 467/491 with mufflers 486/505 open

Using a flat tappet cam ..........

XE268H 224/230/ on 110* - 428/473 with mufflers - 446/486 open
Magnum 280H 230/230 on 110* - 426/463 with mufflers - 446/477 open

You can download CamQuest here for free from CompCams. Play around with differant heads, cams, etc. I don't know how accurate it is but you can compare differant parts.

http://www.compcams.com/Pages/364/camquest6.aspx

 

[adv1288]

Cool. Thanks a lot for the help. 🙂

 

[Da Reazon]

Got to find out what the current compression ratio is how it sits or what a stock sb400 compression ratio would be. Then You can choose heads uless your not worried about having low compression low power or to high compression race gas. And that comps cams simulator tend to shoot numbers a bit high fyi.

 

[86Cutlass383SR]

And that comps cams simulator tend to shoot numbers a bit high fyi.

It's not meant to be a dyno, it's to compare differant cams and combos.

I've seen two engines using the same parts vary in power by 50 - 75 hp. I've also seen engines with less cam and compression put out more power than an engine with more cam and compression. It's all in the combo and tuning, and engine building.